LAST EDITED ON Jul-06-20 AT 01:30 PM (EDT)
 
I have discovered that pigs, even Alpha Porkers, can't climb. So you can basically wall them in with 4m high foundation blocks and walls from a distant vantage point, then go collect your stuff and leave them to oink in pointless rage.

Or you can put a floor over them and build a factory on top out of spite.

--sofaspud
--the roaring of a smelter neatly drowns out most of the squealing pig noises